Plotter pen housing



FIG. 1 is a perspective view of a plotter pen housing showing our new design;

FIG. 2 lis a side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a cross-sectional view thereof, taken on line 4--4 of FIG. 2;

FIG. 5 is a cross-sectional view thereof, taken on line 5--5 of FIG. 2; and,

FIG. 6 is a partial cross-sectional view thereof, on an enlarged scale. 

The ornamental design for a plotter pen housing, as shown and described. 